STRUCT XHCI_SIDEBAND(9)

💖 struct xhci_sideband(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this one lives in struct xhci_sideband(9) land and it's literally all about sideband. buckle up 🎀

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🌸 NAME 🌸

struct xhci_sideband — the representation of a sideband accessed usb device. that's it, that's the whole vibe 🦋

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✨ SYNOPSIS ✨

here's the struct in all its glory, no cap, typed out exactly:

struct xhci_sideband {
    struct xhci_hcd                 *xhci;
    struct xhci_virt_device         *vdev;
    struct xhci_virt_ep             *eps[EP_CTX_PER_DEV];
    struct xhci_interrupter         *ir;
    enum xhci_sideband_type         type;
    struct mutex                    mutex;
    struct usb_interface            *intf;
    int (*notify_client)(struct usb_interface *intf, struct
xhci_sideband_event *evt);
 };

🧩 Members 🧩

• xhci — the xhci host controller that the usb device is connected to. the main character of the whole setup 👑
• vdev — the usb device that's being accessed via sideband 🫶
• eps — an array of endpoints, all controlled via sideband. it's an array, bestie, sized EP_CTX_PER_DEV 🌈
• ir — event handling plus buffer for the sideband accessed device ⚡
• type — the xHCI sideband type, an enum xhci_sideband_type 💅
• mutex — the mutex for sideband operations. lock it, don't be messy 🔒
• intf — the USB sideband client interface 🍓
• notify_client — the callback for xHCI sideband sequences. it takes a struct usb_interface *intf and a struct xhci_sideband_event *evt and returns an int 📣

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📖 Description 📖

so the source literally says FIXME here — usb device accessed via sideband. and then: keeping track of sideband accessed usb devices. that's the whole description, she's a little unfinished, we still love her 💀💜

ngl the FIXME is right there in the original, so don't come for me — I'm just the messenger 🧚

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👀 SEE ALSO 👀

• the kernel file ./include/linux/usb/xhci-sideband.h — go read it, it's giving source of truth 📂
• struct xhci_sideband_event(9) — the event struct, the other half of this situationship 💞

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and that's the page, periodt 💅 this lil' rewrite came to you from the <rainbow>Kernel API Manual</rainbow>, sourced from ./include/linux/usb, dated October 2026, and it will forever be titled struct xhci_sideband(9) — mwah, bye bestie 🫶🎀✨